Questions about customizing Sold! Theme

I’m having some troubles customizing a couple things in my site using the Sold! Theme. Maybe you can help.

1. In Appearance>Theme Options>Skin I’m changing the settings for different item’s colours with no success. Can anyone explain why? Specifically I want to change the colour of the navigation bar. Other things too, but mostly that.

2. I’d like to install a web-font to customize the typography on my site, but I’m not familiar with how to do this with a Wordpress theme.